US3924662A - Weft cutter control apparatus - Google Patents

Weft cutter control apparatus Download PDF

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Publication number
US3924662A
US3924662A US557500A US55750075A US3924662A US 3924662 A US3924662 A US 3924662A US 557500 A US557500 A US 557500A US 55750075 A US55750075 A US 55750075A US 3924662 A US3924662 A US 3924662A
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US
United States
Prior art keywords
cutter
lever
weft
operative
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US557500A
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English (en)
Inventor
Edward S Budzyna
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Draper Corp
Original Assignee
Rockwell International Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rockwell International Corp filed Critical Rockwell International Corp
Priority to US557500A priority Critical patent/US3924662A/en
Application granted granted Critical
Publication of US3924662A publication Critical patent/US3924662A/en
Priority to CA244,295A priority patent/CA1030846A/en
Priority to GB3470/76A priority patent/GB1531291A/en
Priority to IT48080/76A priority patent/IT1053987B/it
Priority to FR7606443A priority patent/FR2303877A1/fr
Priority to JP51024953A priority patent/JPS51112973A/ja
Priority to DE19762609953 priority patent/DE2609953A1/de
Priority to BR7601449A priority patent/BR7601449A/pt
Priority to CH762971A priority patent/CH608838A5/xx
Priority to BE165082A priority patent/BE839464A/xx
Assigned to DRAPER CORPORATION, reassignment DRAPER CORPORATION, CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE APRIL 1,1982 Assignors: DELTA ACQUISITION CORPORATION,
Assigned to DELTA ACQUISTION CORPORATION reassignment DELTA ACQUISTION CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ROCKWELL INTERNATIONAL CORPORATION
Assigned to CITICORP INDUSTRIAL CREDIT INC. reassignment CITICORP INDUSTRIAL CREDIT INC. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DRAPER CORPORATION F/K/A DELTA ACQUISITION CORPORATION
Assigned to STANCHART BUSINESS CREDIT, A CORP. OF CA. reassignment STANCHART BUSINESS CREDIT, A CORP. OF CA. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DRAPER CORPORATION
Assigned to DRAPER CORPORATION, A CORP. OF GEORGIA reassignment DRAPER CORPORATION, A CORP. OF GEORGIA RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: CITICORP INDUSTRIAL CREDIT, INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms

Definitions

  • the invention pertains to a weft cutter control mechanism for shuttless looms of the pick and pick insertion type.
  • the control mechanism includes means for effecting generally linear movement of the cutter as it is moved to its weft cutting position in close proximity with the edge of the fabric and to its rest or inoperative position which is clear of the path of travel of the looms reed during beat-up of the weft.
  • the inserting carrier When the inserting carrier is caused to move toward the shed to insert the next pick, the weft is guided across the interior of the carrier and into a gripping element which forms a part of the forward wall of said carrier.
  • this carrier continues to move toward the shed the lay beam and reed supported thereby are being pivoted rearwardly from the position of beat-up of the previously inserted pick.
  • the warp threads are crossing to present a new shed opening and the thread cutter is caused to perform its intended function of cutting the weft at a point interme diate the gripping element on the forward wall of the carrier and the side of the fabric to which it extends.
  • a problem which has existed with shuttleless looms of the single pick insertion type is that of which is considered excessive length of the fringe on the weft insertion side of the fabric and which necessitates an additional fabric finishing operation for cutting off these ends to a desirable and acceptable length.
  • weft cutters are positioned so as to provide clearance between then and the looms reed during the latters movement with the lay beam to and from weft beat-up position. Very frequently with width of the fabric being woven is less than the length of the looms reed and results in an undesirable length of fringe on the weft insertion side of the fabric.
  • the weft cutter control device has eliminated the problems of excessive fringe length on the weft insertion side of the fabric and additional fabric finishing step many mills have considered necessary by shearing said fringe to an acceptable length.
  • the weft cutter control apparatus of the present invention includes a cutter mounting bar with the weft cutter slidably carried therein.
  • This cutter mounting bar is pivotably mounted on a pivotable mounting lever in a manner which provides a fulcrum point between the ends of said cutter mounting bar.
  • the pivotable mounting lever is connected to a cutter shaft that is oscillatably driven by cam means from the looms weft control housing and is effective in alternately moving the cutter between operative and inoperative positions.
  • a cutter actuating lever is operatively connected at one end to the cutter and its opposite end is connected to the cutter shaft in a manner to effect actuation of the cutter when moved to its operative position by the pivotable mounting lever.
  • a cutter bar control lever connects the end of the cutter mounting bar, on the opposite side of the fulcrum point from the cutter, and extending forwardly therefrom its opposite end is pivotably connected at a fixed location above and slightly forward of the cutter shaft.
  • the combination of elements which operatively interconnect the cutter with the cutter shaft defines a parallelogram linkage device which provides a generally linear movement of the cutter between its operative and inoperative positions.
  • Another object of the invention is to provide a weft cutter control apparatus which is effective in causing the cutter to cut each pick of weft so as to form a fringe of predetermined and acceptable length thereby elminating the additional fabric finishing operation of shearing said fringe.
  • a further object of the invention is to provide a mechanism which in timed sequence with operation of the loom provides a minimum amount of time and distance to alternatively move the weft cutter between its operative and inoperative positions.
  • FIG. 1 is a view in side elevation of a portion of a shuttleless loom showing the weft cutter control apparatus according to the invention applied thereto;
  • FIG. 2 is a view similar to FIG. 1 but showing further detail of the means for moving the cutter between its operative and inoperative positions;
  • FIG. 3 is a top view of the weft cutter and control apparatus therefore shown in FIGS. 1 and 2;
  • FIG. 4 is a view in said elevation of the cutter and its associated linkage as seen looking in the direction of the indicating arrow 4 in FIG. 1.
  • FIG. 1 the looms lay beam 10 3 that extends between the loom frames (not shown).
  • the lay beam supports a conventional form of reed 11 through which warp threads 12 are adapted to pass.
  • a weft inserting carrier 13 is shown in FIG. 1 and in a known manner is fixed to the end of an inserter or flexible tape 14 which during the performance of its intended function is wrapped about and unwrapped from a tape wheel (not shown) located at the side of the loom.
  • FIG. 3 a portion of the loom s weft control housing is shown at 15 which is mounted in the usual manner on the upper right-hand side of the loom and has rotatably supported therein a pair of cam members 16 and 17. These cam members are contiguously mounted on a driven shaft (not shown) that is rotated in a known manner by gear means from the looms cam shaft. Cam member 16 functions as the cutter positioning cam while cam member 17 serves to actuate the weft cutter and will be more fully described hereinafter.
  • the weft cutter controlled by the apparatus comprising the invention is identified generally in FIGS. 1, 2 and 3 by numeral 18 and is slidably carried in a cutter mounting bar 19.
  • This cutter mounting bar is pivotally mounted to one end of the pivotable mounting lever 20 by means of a bolt 21 FIGS. 1 and 3 which provide a fulcrum point between the ends of said cutter mounting bar.
  • the opposite end of the pivotable mounting lever 20 is in the form of a hub 22 having an integrally formed lug 23 that extends in a forwardly direction and serves as a means for limiting movement of the pivotable mounting lever for reasons yet to be described.
  • the hub 22 of the pivotable mounting lever 20 is assembled on a cutter shaft 24 which is horizontally supported for oscillating movement in a U-shaped bracket member generally indicated in FIG. 3 by numeral 25.
  • the weft cutter control apparatus also includes a cutter actuating lever 26 one end of which is curved as at 27 and is provided in this curved portion with an arcuated cam channel 28.
  • the weft cutter generally indicated by numeral 18 includes a blade element 29 which is fixed in and protrudes from the lower end of the cutter mounting bar 19. Slidably carried in the cutting bar 19 and in frictional engagement with blade element 29 a cutting blade 30 is provided (FIG. 4) which when lowered, as will be described cooperates with said blade element 29 to cut the weft. Adjacent the upper end of the cutting blade 30 a laterally extending pin 31 is provided which extends into the arcuated cam channel 28 and serves as the operating connection between said cutting blade and the cutter actuating lever 26.
  • the end of the cutter actuating lever opposite the curved end 27 is in the form of a hub 32 which is fixed on the cutter shaft 24 in close proximity with hub 22 (FIG. 3) by means of a retaining pin 33.
  • the pivotable mounting lever 20 and the cutter actuating lever 26 are continually urged into general alignment, one with the other by means of a torsion type spring 34.
  • This spring 34 as shown in FIG. 3 is carried on a retaining member 35 which assembles in and extends laterally from one side of the pivotable mounting lever 20.
  • one end of the torsion spring 34 is in contact with hub 22 of the pivotable mounting lever 20 and the opposite end engages a pin element 36 (FIG. 3) fixed in the side of the cutter actuating lever 26 and extends laterally therefrom beneath and beyond said pivotable mounting lever 20.
  • a cutter bar control lever 37 completes the number of linkage elements for the'weft cutter control apparatus and has one end thereof pivotably connected to the end of the cutter mounting bar 19 as at 38 which is the opposite side of the fulcrum point from the end at which the cutter l8 performsits intended function.
  • the opposite end of this cutter bar control lever 37 is pivotably connected as at 39 to an L-shaped bracket 40 that is adjustably assembled on a support bracket 41 by means of a stop bolt 42 and lock nuts 43 and 44 (FIG. 1).
  • the head of this stop bolt 42 is identified in FIG. 1 by numeral 45 and is disposed so as to engage the upper surface of the lug 23 integrally formed on the hub 22 of the pivotable mounting lever 20 when the cutter 18 is in its operative position.
  • the combination of the pivotable mounting lever 20, cutter mounting bar 19 and the cutter bar control lever 37 and the means by which they are operatively associated with the oscillatable cutter shaft 24 defines a parallelogram linkage device for effecting generally linear movement of the cutter 18 between the solid line operative position and the phantom line inoperative position shown in FIG. 1.
  • the support bracket 41 is assembled to the side of the weft control housing 15 by means of cap screws 46 and 47 which also provide the means for the assembly of the U-shaped bracket 25 to said control housing.
  • This support bracket 41 includes an adjustment slot 48 which extends in a plane parallel with the axis of the cutter shaft 24 and provides a means for re-locating bracket 40 in the event it is necessary to change the location of the weft cutter control apparatus on said cutter shaft.
  • the cutter shaft 24 is oscillated by means interconnecting it with thecam members 16 and 17 which includes a cam follower in the form of a roller 49 (FIGS. 2 and 3) carried on the forward end of a spring biased tappet-like member 50 which maintains said roller 49 in contact with the outer periphery of said cam members.
  • the opposite end of this tappet-like member is in frictional contact with a roller element 51 which is carried on and disposed intermediate the ends of an upwardly directed lever 52 (FIGS. 2 and 3).
  • the lower end of lever 52 is in the form of a hub 53 and is fixed on the cutter shaft 24 by means of a key 54 as shown in FIG. 2.
  • the upper end of lever 52 is also provided with a hub 55 (FIG.
  • a pin 56 assembles and serves as shown in this FIG. as a means for attaching one end of a coil spring 57. Extending in a forwardly direction the opposite end of a coil spring 57 is suitably attached at a fixed location (not shown) and the combination of said spring and lever 52 maintain roller 49 in contact with the outer periphery of either cam member 16 or 17.
  • the lay beam and reed supported thereby are caused to be moved to and fro in a well known manner during the insertion and beat-up of each pick of weft.
  • the lay beam and reed commence to move rearwardly as the upper and lower sheets of warp threads reverse their positions to form a new shed for the next pick.
  • the weft inserting carrier is moving toward the shed and the dictates of cams l6 and 17 within the weft control housing are effective upon the cutter shaft so as to move the weft cutter 18 to its operative position.
  • Cam 16 is effective in rotating the cutter shaft 24 to a position that moves the weft cutter to the solid line-position shown in FIG. 1 which is its operative position.
  • cam 17 makes contact with roller 49 and is effective in pivoting the cutter actuating lever 26 a short distance beyond the location the pivotable mounting lever 20 is capable of moving.
  • the additional pivotal movement of the cutter actuating lever 26 is effective in actuating the cutter by moving the cutting blade 30 downwardly to a cooperating position with the lower portion of blade element 29.
  • cams 16 and 17 bring the low points of said cams to a position which causes roller 49 to move in a forwardly direction by the biasing force of coil spring 57 which maintains said roller in contact with the periphery of said cams.
  • This movement also rotates the cutter shaft in an anticlockwise direction causing the weft cutter to be raised to the phantom line position shown in FIG. 1.
  • a cutter mounting bar mounted on said pivotable mounting lever to provide a fulcrum point between the ends of said cutter mounting bar, said cutter being slidably carried in said cutter mounting bar for operative cooperation with one end of the latter in cutting the weft;
  • a cutter actuating lever operatively connected adjacent one end to said cutter with the opposite end being connected to said cutter'shaft;
  • cutter bar control lever means pivotably connecting the end of said cutter mounting bar on the opposite side of the fulcrum point from the cutter cooperating end thereof to a fixed pivotal position adjacent said cutter shaft, said cutter actuating lever and said cutter bar control lever means cooperating during actuation of said cutter shaft to move said cutter between an operative position at the fabric line and an inoperative position located upwardly and forwardly of the fabric fell line so that the cutting mechanism is clear of the loom reed during beatup.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US557500A 1975-03-12 1975-03-12 Weft cutter control apparatus Expired - Lifetime US3924662A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US557500A US3924662A (en) 1975-03-12 1975-03-12 Weft cutter control apparatus
CA244,295A CA1030846A (en) 1975-03-12 1976-01-27 Weft cutter control apparatus
GB3470/76A GB1531291A (en) 1975-03-12 1976-01-29 Weft cutter control apparatus
IT48080/76A IT1053987B (it) 1975-03-12 1976-02-12 Perfezionamento nei dispositivi di taglio di trama per telai tessili
FR7606443A FR2303877A1 (fr) 1975-03-12 1976-03-05 Mecanisme de commande de la cisaille de trame d'un metier a tisser sans navette
JP51024953A JPS51112973A (en) 1975-03-12 1976-03-08 Loom without shuttle
CH762971A CH608838A5 (xx) 1975-03-12 1976-03-10
BR7601449A BR7601449A (pt) 1975-03-12 1976-03-10 Aperfeicoamento em tear
DE19762609953 DE2609953A1 (de) 1975-03-12 1976-03-10 Steuereinrichtung fuer schussfadenabschneider in schuetzenlosen webstuehlen
BE165082A BE839464A (fr) 1975-03-12 1976-03-11 Appareil de commande de coupe-trame

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US557500A US3924662A (en) 1975-03-12 1975-03-12 Weft cutter control apparatus

Publications (1)

Publication Number Publication Date
US3924662A true US3924662A (en) 1975-12-09

Family

ID=24225670

Family Applications (1)

Application Number Title Priority Date Filing Date
US557500A Expired - Lifetime US3924662A (en) 1975-03-12 1975-03-12 Weft cutter control apparatus

Country Status (10)

Country Link
US (1) US3924662A (xx)
JP (1) JPS51112973A (xx)
BE (1) BE839464A (xx)
BR (1) BR7601449A (xx)
CA (1) CA1030846A (xx)
CH (1) CH608838A5 (xx)
DE (1) DE2609953A1 (xx)
FR (1) FR2303877A1 (xx)
GB (1) GB1531291A (xx)
IT (1) IT1053987B (xx)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1807745A (en) * 1931-06-02 Thread cutter
US3530902A (en) * 1967-10-13 1970-09-29 Fischer Ltd Georg Weft cutter and control for weaving machine
US3610292A (en) * 1969-02-28 1971-10-05 Fischer Ag Georg Device to form a cloth selvage with tucked-in filling ends on a weaving machine
US3814140A (en) * 1971-06-21 1974-06-04 Somet Soc Mec Tessile Cutting device for looms

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1807745A (en) * 1931-06-02 Thread cutter
US3530902A (en) * 1967-10-13 1970-09-29 Fischer Ltd Georg Weft cutter and control for weaving machine
US3610292A (en) * 1969-02-28 1971-10-05 Fischer Ag Georg Device to form a cloth selvage with tucked-in filling ends on a weaving machine
US3814140A (en) * 1971-06-21 1974-06-04 Somet Soc Mec Tessile Cutting device for looms

Also Published As

Publication number Publication date
FR2303877A1 (fr) 1976-10-08
BR7601449A (pt) 1976-09-14
CA1030846A (en) 1978-05-09
IT1053987B (it) 1981-10-10
JPS51112973A (en) 1976-10-05
CH608838A5 (xx) 1979-01-31
BE839464A (fr) 1976-07-01
DE2609953A1 (de) 1976-09-30
GB1531291A (en) 1978-11-08

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Date Code Title Description
AS Assignment

Owner name: DRAPER CORPORATION,

Free format text: CHANGE OF NAME;ASSIGNOR:DELTA ACQUISITION CORPORATION,;REEL/FRAME:004097/0735

Effective date: 19820920

Owner name: DELTA ACQUISTION CORPORATION; HORNADAY RD., GREENS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ROCKWELL INTERNATIONAL CORPORATION;REEL/FRAME:004113/0020

Effective date: 19820321

AS Assignment

Owner name: CITICORP INDUSTRIAL CREDIT INC., A CORP. OF DE

Free format text: SECURITY INTEREST;ASSIGNOR:DRAPER CORPORATION A CORP. OF GA F/K/A DELTA ACQUISITION CORPORATION;REEL/FRAME:004070/0533

Effective date: 19821021

AS Assignment

Owner name: STANCHART BUSINESS CREDIT, 200 GALLERIA PARKWAY, N

Free format text: SECURITY INTEREST;ASSIGNOR:DRAPER CORPORATION;REEL/FRAME:004539/0198

Effective date: 19860328

AS Assignment

Owner name: DRAPER CORPORATION, GREENSBORO, NORTH CAROLINA A C

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CITICORP INDUSTRIAL CREDIT, INC.;REEL/FRAME:004664/0583

Effective date: 19860331